Outflank: +4 to flank bonus, critical hits allow ally to make OA.
Duck and Cover: Use adjacent ally's Reflex Saving Throw. Gain +2 to AC against ranged attacks when ally is wielding a shield.
Allied Spellcaster: +2 to overcome SR when adjacent to ally who also has magic. +4 when ally has same spell prepared and +1 to level of spell.